Home / 18,405.45-25,416.05-15,570.45

Finding the Fourth Proportional to 18,405.45, 25,416.05 and 15,570.45

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Solution

The fourth proportional to 18,405.45, 25,416.05 and 15,570.45 is: 21,501.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,405.45 : 25,416.05 = 15,570.45 : x
  2. Step 2: Convert to fraction form
    18,405.45/25,416.05 = 15,570.45/x
  3. Step 3: Cross multiply
    18,405.45x = 25,416.05 × 15,570.45
  4. Step 4: Simplify right side
    18,405.45x = 395,739,257.87
  5. Step 5: Solve for x
    x = 395,739,257.87/18,405.45
  6. Step 6: Final answer
    x = 21,501.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.